This line chart visualizes the cumulative global death toll from the COVID-19 pandemic over time, using data from the Johns Hopkins Coronavirus Dataset. A horizontal marker highlights when deaths reach 10,000, while a vertical marker labels the most recent date on the x-axis. Built with React and D3 v5, the visualization uses SVG rendering via `scaleTime`, `scaleLinear`, and `line` generators, with axes drawn using `axisBottom`. The chart pulls its data asynchronously from a CSV file fetched via D3’s `csv` function and transforms daily death counts into a date series.